Surface modification of a natural zeolite by treatment with cold oxygen plasma: Characterization and application in water treatment
| Autor: | Ma. Ana Pérez-Cruz, Virginia Hernández-Montoya, Miguel A. Montes-Morán, Norma Aurea-Rangel Vázquez, Paola S. De Velasco-Maldonado |
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| Rok vydání: | 2018 |
| Předmět: |
Clinoptilolite
Chemistry Inorganic chemistry General Physics and Astronomy 02 engineering and technology Surfaces and Interfaces General Chemistry Crystal structure 010501 environmental sciences 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Surfaces Coatings and Films Adsorption Specific surface area Surface modification Water treatment 0210 nano-technology Zeolite Mesoporous material 0105 earth and related environmental sciences |
| Zdroj: | Applied Surface Science. 434:1193-1199 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2017.11.023 |
| Popis: | In the present work the possible surface modification of natural zeolite using cold oxygen plasma was studied. The sample with and without treatment was characterized using nitrogen adsorption isotherms at −196 °C, FT-IR spectroscopy, SEM/EDX analysis and X-Ray Diffraction. Additionally, the two samples were used for the removal of lead and acid, basic, reactive and food dyes in batch systems. The natural zeolite was found to be a mesoporous material with a low specific surface area (23 m2/g). X-ray patterns confirmed that clinoptilolite was the main crystal structure present in the natural zeolite. The molecular properties of dyes and the zeolitic structure were studied using molecular simulation, with the purpose to understand the adsorption mechanism. The results pointed out that only the roughness of the clinoptilolite was affected by the plasma treatment, whereas the specific surface area, chemical functionality and crystal structure remained constant. Finally, adsorption results confirmed that the plasma treatment had no significant effects on the dyes and lead retention capacities of the natural zeolite. |
| Databáze: | OpenAIRE |
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